Electrical transmitting apparatus for controlling the sighting of guns.



A. T. DAWSON & G. T. BUOKHAM. TRANSMITTING APPARATUS FOR OONTROLLIN G THE SIGHTING 0F GUNS.

ELECTRICAL APPLICATION FILED MAR. 20, 1909.

Patented May 18, 1909.

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ARTHUR TREVOR DAWSON 'AND GEORGE THOMAS BUOKHAM, OF WESTMINSTER, LONDON, ENGLKNDfASSIGNORS TO "VICKERS SONS & MAXIM LIMITED, OF WESTMINSTER, ENG

LAND

ELECTRICAL raaissmzvrrme Karla-Barres FDRCDNTRGILLING msrefi rme-or sfltrs.

No. 922,399. Original application filed November 20, 1908,

, [II gull whom it may concern:

Be it known that we,

'for Controlling the Sighting of Guns, of which the following is a specification;

mittinfg apparatus for controlling the posi- 'tion-o v respect to the range dial of the sighting apparatus and it has for its chief object to combine with the transmitting apparatus what 'i'sknown in connection with sighting appa 5ratus as a calibrating device for the 'purpose of*enabling corrections to be made in the setting of the electrically actuated pointer to=compensate more particularly for errors of the day affecting the range. This calibrating device is mechanically controlled the transmitter switch that electrically controls the movement of the said pointer, whereby variable relative movement between -'the pointer and the range dial is caused to take place in addition to the movement transmitted electrically through the said switch to'the pointer. According to this invention the said variable relative movement is obtained by imparting to the range dial over which the electrically actuated pointer moves,'the necessary variable movement. cam disk is suitably connected with the said range dial and is rotatably mounted and adapted to be rotated through suitable gear -'ing from the spindle of the transmitter switch. On the said cam diskis acam or e r le carr ed at one end of an armory ev {which spiral groove with" whichenga es swings .ina bearing carried on easing i of the instrument, and which proyided witha, sliding block. Thisslidn block.

may beladjusted on; the lever in- -any.desired position. either side of. the. bearing; ac; cording-to whether the movemen 'rnparted to the range'dial by the calibratiii degvieer' requires to be increased ordimin bed". The

sliding block is provided with an index mark to be used in conjunction with suitable graduations on the lever.

*In order ='tl1at=0ur said invention may be Specification of Letters Patent.

Serial No. 463,731. Divided and. this application filed March 20, 1909.

' Serial- No. 484,743.

ARTHUR Tnnvon I Dawson and Gnone'n THOMAS 'BucK'nAM, i both subjects of the King of Great Britain, residing at 32 Victoria street, llvestminster, 1 fin the county of London, England,ha,v e .in- E vented certain new and useful ,Improvemerits in Electrical Transmitting Apparatus an electrically actuated pointer with E Pas as May 18,1909.

the motor for electrically actuating the This invention relates to electricaltranspointer. 4 v D is -the cam=disk situated at the back of the mange dial A and rotatably mounted on E a boss A concentric withthe range dial and forming part=of thecasing'o'r framing A thereof. Fixed'to or forming pa'rt of the cam disk D isa worm wheel D which gears withia 'worin E on the spindle of the transmitter switch E, means being provided for throwing 'thecam disk out of gear so that the latter can be returned to the origianal position without nnovin the transmitter switch E. This may be 'edected by forming the spindle E with the universal @joint E and by supporting the worm-end of the spindlein-abearing E pivotally=mounted in 1a sliding block E which is carried by the 1 casing A Gonnected to the sliding block E is a spring controlled bolt E capable of being 'retractedby the handle 11] for disengagingthe worm E from the worm wheel 1), any suitable means being provided for retaining the bolt 'in its retracted position.

Formed in the disk 'D is a cam groove 1) with. which engages a roller cl carried on the end oi the short or bent arm of the lever (Z. This lever 11 is pivotally mounted on a bearing a carried ina bracket on thecasing or framing A of the apparatus. The said lever is provided with a sliding block (i having a clamping screw d by means of whichit may be secured tothe lever in any desired 'positionmn either side of the axis 1 thebearing a; according to whether the variation iuthe movementof the ointer B iiequires'to be increased or diminis ed. .The sliding bloclcdf isprovided with an index able graduatitms (Z on the lever.

The hon C of the motor O and its gearing is stationary and the sliding block 03 on the lever (Z is-connected by suitable mechanism with the range dial A Whose angular -posi-.

mark (i to be used in conjunction with suit- I v tion would be'varied in accordance with the movements of the lever 03 and the settin of the sliding block (1 on the latter. The ox C is formed in a piece with the" casing or framing A and- ,the sliding block 03 is connected through the link d and lever d 'to the toothed segment d gearing with the toothed segment c* which is secured to.or

- forms part of the back of the range dial 'A.

The aforesaid transmitter switch E is of :thedrum'type the spindle E of this switch being connected with the cam 'diskD through worm gearing as, above explained. The

. electric current is supplied to the transmitter' switch. through a quick break switch 'e adapted to be worked by a system of levers e which are carried by the switch actuating handle 6 and which come into operation. on grasping the said handle as is well understood in connection with' switches of this kind. .The spindle e carrying this handle is connected by toothed wheels ea with the spindle E? of the transmitter switch and thereby imparts motion thereto when the handle is turned. Any other convenient form of transmitter switch 'may" be'used;

To prevent the transmitter switch E from being moved when current is not passing, a

locking arrangement is provided an in the example shown is in the form of a "c \itch e operated by the aforesaid system of levers and so arranged that the quickbreak switch 6 makes contact before the cluteh is free.

In using the apparatus say for correcting. therange to compensate, for errors of theday, the sliding .block d -is firstunoved to the requisite extent on the lever d to one side or other of the axis of the bearing a,

according as the correction is-to begreater or less than. the normal. v The transmitter. switch handle a is then-turned to causethe' pointer B to indicate the desired range, this l'nOVGl'llGl'lt of the pointer being effected through the intervention of 'the toothed relatively to the range dial is increased or diminished by the calibrating lever (l and the cam groove 1) in the said disk D imparting motion to the rangedial, vitbeing understood that the extent of the movement transmitted through the calibrating lever d 'is regulated-by the position to which the block 02 is set on'thesaid lever d.

. A greater or less number ofturns will require to be given to the switch handle 0 to bring the pointer to the desired range, ac-

cording as the relative movement of the pointer and range dial is increased or diminished; thus the pointers of all the sighting apparatus that are in electrical connection with the transmitting apparatuswill move through a greater 0 less angle as the case may be. 'erably' be additionalto that which is made This correc ion will prefby adjusting the calibrating device at each of'the sighting alpparatus to compensate for changes n muzz e'velocityand temperature.

The hinge pin d by means of which the connecting link d for actuating the rotary range dial A is attached'to the sliding block 03 may be slidablyjzenhected' with the block, as shown in'Fig. 1. By changing the position of this pin al in relation to the sliding block, the angular movement of the rotary rangedial A may be further adjusted to allow-for other .erroi's in ranging, such as, for instance, the difference in range due to the use 'of different kinds of shot. This scparate slide may be provided on the sliding block of either the calibrating device appernation ofa rotary transmitter switch, an

electrically actuated pointcr under the control of said switch, a range dial over which I the said pointer moves, a cam disk, means for actuating said cam disk from the switch andflmeans for transmitting variable move-1 ment from said. cam disk to the said range dial. i v 2 In electrical transmitting apparatusfor' controlling the sighting of guns, the;.coinbination efp-a rotary transmitter switch, an electrically actuated pointer under the control of'said switch, a range dial over which the said pointer moves, a cam disk,'-mea-ns for actuating said cam disk from the switch, a bell'crank lever arranged'in conjunction with the said cam disk, -a sliding block on (ine of the arms of the bell crank lever, and means, attached to the sliding block for imparting movement to the aforesaidfrange' dial. 1 r

3. Iuelectrical transmitting apparatus for controlling the sighting of=guns. the com bination of a rotary transi'nitte switch, an

electrically 'actuatedpointer under'the control of said switch, a range dial over which the said-pointer moves, a cam disk, means for actuating said cam disk from the switch, a bell crank lever arranged in con unction with'the said cam disk, a sllding block on one of the arms of the bell crank lever, a link attached to the sliding block, a lever connecting the link to a toothed segment and another segment gearing therewith, and attached to the aforesaid range dial. v

- 4. :In electrical transmitting apparatus for controlling the sighting of guns, the combination of a rotary transmitter switch, an electrically actuated pointer under the containing to the transmitting apparatus or to the sighting apparatus or to both of them.

trol of said switch, a range dial over which the said pointer inoves,'a disk, means'for actuating saiddisk from the switch, a spiral groove in said disk,'a' bell crank lever, a

roller on one arm of the said lever engaging with the spiral groove, a sliding block on the other arm ofthe bell crank lever, a linkjattached to said sliding block, a lever connecting the link to a toothed segment, andanother toothed segment gearing therewith and attached to the; aforesaid range dial.

5. In electrical transmitting apparatus for controlling'the sighting of guns, the combination of a rotary transmitter switch, an electrically actuated pointer under the control of said switch, a range dial over which the said pointer moves, a cam disk, a worm wheel moiu ted thereon, a worm meshing therewith,a shaft on which the said worm is mounted and to which the transmitter switch is attached, and means for transmitting variable movement from said cam disk to the said range dial. I

In testimony whereof we aifix oursignatures in presence of two witnesses.

ARTHUR TREVOR DAWSON. GEORGE THOMAS BUCKHAM; WVitnesses:

HENRY KING, ALFRED PEAKS. 

